„205. If the true is what is grounded, then the ground is not true, nor yet false.“

— Ludwig Wittgenstein

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„To what degree is something true or false?“
— Lotfi A. Zadeh
„True art is above false honor.“
— Vladimir Nabokov
„It is the natural tendency of the ignorant to believe what is not true. In order to overcome that tendency it is not sufficient to exhibit the true; it is also necessary to expose and denounce the false.“
— H.L. Mencken
„[ Fuzzy logic is ] a logic whose distinguishing features are (i) fuzzy truth-values expressed in linguistic terms, e. g., true, very true, more or less true, or somewhat true, false, nor very true and not very false, etc2.; (2) imprecise truth tables; and (3) rules of inference whose validity is relative to a context rather than exact.“
— Lotfi A. Zadeh